/*
 * Copyright (c) 2008-2011, Matthias Mann
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *     * Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of Matthias Mann nor the names of its contributors may
 *       be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package nodes;

/**
 *
 * @author Matthias Mann
 */
public class Connection {

    private final Pad source;
    private final Pad destination;

    public Connection(Pad source, Pad destination) {
        if(source == null) {
            throw new NullPointerException("source");
        }
        if(destination == null) {
            throw new NullPointerException("dest");
        }
        this.source = source;
        this.destination = destination;
    }

    public Pad getDestination() {
        return destination;
    }

    public Pad getSource() {
        return source;
    }

    @Override
    public boolean equals(Object obj) {
        if(obj == null || getClass() != obj.getClass()) {
            return false;
        }
        final Connection other = (Connection)obj;
        return (this.source == other.source) && (this.destination == other.destination);
    }

    @Override
    public int hashCode() {
        int hash = 7;
        hash = 79 * hash + System.identityHashCode(this.source);
        hash = 79 * hash + System.identityHashCode(this.destination);
        return hash;
    }
    
}
